In particular, the fourth edition of the text introduces R code for performing all of the analyses, making it an even more excellent reference than the previous three editions. One of the best introductory books on this topic is Multivariate Statistical Methods: A Primer, by Bryan Manly and Jorge A. Multivariate analysis is that branch of statistics concerned with examination of several variables simultaneously. Multivariate Statistical Methods: A Primer, fourth edition (2017) At some time or another, most users of statistics find themselves sitting in front of a large pile of computer output with the realization that it tells them nothing that they really want to know.